:who-references

When the value of the inverse argument is nil (the default), this command prints information in
the database about those functions which reference the global variable
identified by name. When the value of the
inverse argument is true,
this command prints information on the global variables referenced by
the function identified by name.

When inverse is nil,
name can be any lisp object but only global
variables make sense as the value (no cross reference information is
gathered for other types of Lisp objects). When
inverse is true,
name must be a function name (either a symbol or
a list of the type described in the discussion of function specs in
implementation.htm).

The in-functions and
in-files keyword arguments can be used to
restrict the search to particular functions (for
in-functions) or functions defined in particular
files (for in-files). The default value for each
argument is nil, which calls for an
unrestricted search. When inverse is nil (so a list of functions is printed by this
command) a true value for
in-functions or in-files
should be a list of function names or file names (respectively) and
the information printed will be the intersection of the functions
found in the database and the functions in the list or defined in
files in the list (respectively). Note that source file information
must have been recorded for the files in the
in-files list. When inverse
is true (so this function is printing the list of
global variables referenced by the function identified by
name), the list that is the value of
in-functions should be a list of global variables
and only those found in the database and in the list will be
printed.